wordpress.com stats plugin api key (12 posts)

1) installed the wordpress.com stats plugin to geckorock.com
2) created an account on wordpress.com
3) used new api key for both akismet and stats
4) akismet works
5) stats gives following message (second username was blank):

The owner of that API Key (*******) is not on the access list for this blog. When this blog was registered, 's API key was used. To add you to the access list, must visit this blog's stats dashboard page and use the form at the bottom of that page.

I've found 11 other posts in the support forum, but none of them seem to resolve the issue.

Think you may need the API key which you will have received when you originally signed up. It should be in an e-mail some where. I had same issue and solved it with the API key from my original e-mail.

I set up a WP site for somebody else, and I used my API key to activate the stats plugin. I did not anticipate that my firend would need to log in separately to use the plugin each time he viewed it. I tried uninstalling and reinstalling it so he could activate it with his own API key, but the plugin won't accept it.Is there something I can delete in the database to clear out my API key and let him (the person who will be using this the most) use his?

really impossible :
i have had in an another live 2 blogs in .com, then another now hosted. so i have 2 API, and i do not know when i have to use one or another : please 1 API new if you want and only 1 identity enough : the 2 identities
nordcreuse
penseelibre1
cordialy

Error from last API Key attempt:

The owner of that API Key (penseelibre1) is not on the access list for this blog (4376771). To be added to the access list, you must contact support.